203 small tools.
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Fast, focused helpers for data, tokens, encodings, text, web work, time, color, and numbers. Each one runs entirely in this browser tab.
203working utilities
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Popular everyday tools
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Format JSON, inspect JWTs, compare text, test regular expressions, and handle small developer jobs without an upload.
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01.env Inspector, Diff & RedactorValidate dotenv syntax, detect duplicates, compare environments, and produce a share-safe redacted template.Open tool 023D Model InspectorInspect mesh counts, bounds, geometry, and preservation warnings.Open tool 03Advanced Color, Palette & Vision WorkspaceConvert CSS Color 4 values through OKLab, OKLCH, Lab, LCH, RGB, HSL, HWB and CMYK-style output, then build perceptual palettes and accessibility previews.Open tool 04AES-256-GCM Encrypt & DecryptEncrypt text with a random WebCrypto key or authenticate and decrypt this tool’s JSON package.Open tool 05Animation Frame ExtractorExtract every GIF frame as individually downloadable PNG files.Open tool 06Archive Explorer & RepackerInspect a sanitized ZIP tree and selectively download or repack local entries.Open tool 07ASCII Art Banner GeneratorDraw short headings with a deterministic block font for terminals, READMEs, and source comments.Open tool 08Aspect Ratio & Dimensions CalculatorReduce an image or video ratio and calculate missing dimensions for responsive layouts.Open tool 09Audio Transcription & Subtitle GeneratorRun a pinned local speech model and preserve timestamped segments.Open tool 10Audio Trim & Loudness NormalizerTrim audio and apply explicit EBU R128-style normalization in the local media engine.Open tool 11Barcode DecoderDecode supported local QR and barcode images without camera persistence.Open tool 12Base32, Base58 & Ascii85 CodecEncode UTF-8 text or decode three common non-Base64 alphabets.Open tool 13Base64 Encoder & DecoderEncode UTF-8 text as Base64 or decode Base64 back to text.Open tool 14bcrypt Hash & VerifyCreate or verify interoperable bcrypt password hashes through a lazy local WASM engine.Open tool 15Benchmark Result ComparatorCompare already-measured benchmark cases without executing pasted code or scripts.Open tool 16Binary Hex & File Signature InspectorInspect magic bytes, MIME hints, printable strings, entropy, and a bounded hexadecimal preview.Open tool 17BIP-39 Mnemonic Generator & ValidatorGenerate cryptographically random English BIP-39 mnemonics or validate their word list and checksum locally.Open tool 18Browser & Device InformationInspect the capabilities this page can observe without network lookups, fingerprinting scripts, or persistent identifiers.Open tool 19Business Days CalculatorCount inclusive weekdays while excluding user-supplied holiday dates.Open tool 20Byte Endianness SwapperReverse byte order within 16-, 32-, or 64-bit hexadecimal words.Open tool 21Cache-Control AnalyzerParse response caching directives and explain storage and revalidation behavior.Open tool 22CAD Drawing Exchange InspectorValidate supported ASCII DXF drawing primitives and inspect them as typed, bounded CAD JSON.Open tool 23Cargo Version Requirement ExplainerExplain Cargo-compatible SemVer requirements and test a Rust crate version.Open tool 24Case ConverterConvert words to common prose, identifier, and path naming styles.Open tool 25chmod Permission CalculatorConvert Unix permissions between octal and rwx notation.Open tool 26Code & Markup FormatterFormat, validate, or minify popular code and markup with browser-only, language-aware parsers.Open tool 27Color Converter & Contrast CheckerConvert HEX, RGB, or HSL colors and check WCAG contrast between two opaque colors.Open tool 28Color Difference ΔE CalculatorCompare two HEX colors in Lab space using transparent ΔE76 math.Open tool 29Contact Sheet BuilderArrange multiple PNG images into a labeled review grid.Open tool 30Content Security Policy BuilderBuild a conservative CSP header from explicit source lists and explain major protections before deployment.Open tool 31Cookie & Set-Cookie AnalyzerParse one cookie value and flag missing Secure, HttpOnly, and SameSite attributes.Open tool 32Coordinate & Map Data ConverterTurn coordinate rows into inspectable GeoJSON features.Open tool 33CRC32 ChecksumCalculate a standard CRC-32 checksum for UTF-8 text.Open tool 34Cron Expression ExplainerValidate a five-field cron expression and calculate upcoming UTC run times.Open tool 35CSP & CORS Header AnalyzerAnalyze Content-Security-Policy and CORS response headers for common security and interoperability problems.Open tool 36CSS clamp() & Fluid Type CalculatorCalculate a linear CSS clamp() expression between two sizes and viewport widths.Open tool 37CSS Gradient & Palette BuilderCreate a linear-gradient declaration and inspect evenly spaced sRGB swatches.Open tool 38CSS Specificity CalculatorCalculate common selector ID, class, attribute, pseudo-class, element, and pseudo-element weights.Open tool 39CSV & Table ExplorerInspect CSV or TSV as a typed, sortable data table with column-quality profiling.Open tool 40CSV Delimiter & Header DetectorDetect comma, tab, semicolon, or pipe tables and report structural confidence.Open tool 41cURL to Fetch ConverterConvert a focused cURL request into readable browser fetch code.Open tool 42Data URI Builder & ParserBuild a text data URI or safely inspect one without rendering its content.Open tool 43Date & Time Difference CalculatorCalculate the exact elapsed duration between two ISO dates or absolute date-times.Open tool 44Date Format Translator & PreviewPreview a UTC date pattern and show focused strftime, Java, and .NET equivalents.Open tool 45Descriptive Statistics CalculatorCalculate count, range, mean, median, quartiles, population variance, and standard deviation.Open tool 46Docker Run → Compose ConverterParse a bounded docker run command into an inspectable Compose model without invoking a shell.Open tool 47Document Media ExtractorExtract embedded DOCX images and media through a sanitized package tree.Open tool 48Duration ConverterConvert ISO 8601 durations, seconds, or readable time spans into normalized forms.Open tool 49E-book Text & Outline ExtractorExtract readable Markdown from a DRM-free EPUB package.Open tool 50Email Header & MIME InspectorParse an RFC-style email, summarize routing/authentication headers, and inventory MIME parts without rendering content.Open tool 51Email List NormalizerValidate, normalize, deduplicate, and sort a pasted email list without contacting mail servers.Open tool 52Emoji Picker & InspectorSearch a curated, keyboard-friendly emoji palette and inspect the selected Unicode sequence.Open tool 53ETA & Throughput CalculatorEstimate completion time from completed work, total work, and elapsed duration.Open tool 54FASTA, FASTQ & Sequence WorkspaceValidate biological sequence records, preserve quality scores, and convert through typed JSON.Open tool 55Favicon Package GeneratorCreate common PNG icon sizes and ICO output in one local package.Open tool 56File → Base64 EncoderEncode any local file as Base64 or a complete data URI without uploading its bytes.Open tool 57FITS Header & Dimension InspectorInspect bounded FITS primary-header cards, dimensions, and pixel metadata locally.Open tool 58Font Glyph Coverage InspectorInspect names, metrics, Unicode coverage, and embedding guidance.Open tool 59Font Subsetter & Webfont BuilderSubset a local font and produce a web-ready WOFF2 artifact.Open tool 60Fraction, Percent & Scientific ConverterNormalize decimal, fraction, percentage, and scientific notation with exact rational arithmetic.Open tool 61G-code Toolpath Safety InspectorNormalize bounded G0–G3 motions without executing, simulating, or controlling a machine.Open tool 62Git Command ReferenceSearch a curated Git reference by goal and copy safe, non-destructive command patterns.Open tool 63Glob to RegexTranslate a common file glob into an anchored JavaScript regular expression.Open tool 64GPS Track & Map ConverterConvert GPX waypoints and tracks into inspectable GeoJSON.Open tool 65GraphQL Formatter & Operation ExplorerFormat GraphQL documents, list operations and fragments, and check balanced syntax without executing a query.Open tool 66HAR Waterfall & Privacy InspectorInspect an HTTP Archive as a request waterfall and flag cookies, authorization, query secrets, and oversized assets.Open tool 67Hash GeneratorCalculate standard cryptographic digests for text using WebCrypto.Open tool 68HMAC GeneratorAuthenticate text with a shared secret and SHA-2 HMAC.Open tool 69HTTP Basic Auth Builder & DecoderBuild or decode an HTTP Basic Authorization value locally.Open tool 70HTTP Header ParserParse an HTTP header block into a normalized local report and flag credential-bearing fields.Open tool 71HTTP Request Code GeneratorTurn cURL or a neutral request model into safe, editable request snippets for ten popular targets.Open tool 72HTTP Status Code LookupExplain common HTTP response codes, body expectations, and status class.Open tool 73IBAN Validator & ParserNormalize an IBAN, validate its country length and ISO 13616 checksum, and expose common BBAN fields locally.Open tool 74IEEE-754 Float VisualizerInspect sign, exponent, fraction, hexadecimal bytes, and decimal value.Open tool 75Image CompressorRe-encode and compare an image with visible quality and dimension controls.Open tool 76Image Metadata Privacy ViewerInspect EXIF and privacy-sensitive location, device, author, and time fields.Open tool 77Image OCR WorkbenchRecognize image text locally with explicit language-pack downloads.Open tool 78Image Palette ExtractorExtract dominant CSS-ready colors and transparency coverage.Open tool 79Image Resize, Rotate & Flip StudioResize and transform raster pixels with a live, format-aware result.Open tool 80International Phone Parser & FormatterParse, validate, classify, and format international phone numbers with pinned numbering metadata.Open tool 81IPv4 Address Representation ConverterConvert one IPv4 address between dotted decimal, unsigned integer, hexadecimal, octal, and binary.Open tool 82IPv4 CIDR & Subnet CalculatorInspect an IPv4 address and CIDR prefix without any network requests.Open tool 83IPv4 Range Expander & SummarizerSummarize an inclusive IPv4 range or expand a safely bounded range.Open tool 84IPv6 CIDR CalculatorNormalize IPv6 addresses and calculate network ranges, host counts, reverse DNS, and IPv4-mapped details.Open tool 85IPv6 ULA Prefix GeneratorGenerate a random RFC 4193-style locally assigned /48 prefix with subnet examples.Open tool 86JSON Deep MergeMerge two JSON documents recursively with an explicit array policy.Open tool 87JSON DiffCompare two JSON values by path instead of noisy text formatting.Open tool 88JSON FlattenTurn nested objects and arrays into a flat path-to-value map.Open tool 89JSON MinifierValidate JSON and remove insignificant whitespace.Open tool 90JSON Patch & Merge Patch WorkbenchCreate or apply RFC 6902 JSON Patch and RFC 7396 JSON Merge Patch documents with path-level validation.Open tool 91JSON Pointer ExplorerResolve an RFC 6901 JSON Pointer and inspect the selected value without running expressions.Open tool 92JSON Pretty PrintFormat JSON with readable indentation and an optional stable key order.Open tool 93JSON Repair with Patch PreviewRepair comments, a byte-order mark, and trailing commas without guessing missing business data.Open tool 94JSON Schema Example GeneratorCreate a deterministic example value from local JSON Schema keywords.Open tool 95JSON Schema GeneratorInfer a draft-aware JSON Schema from a representative JSON value.Open tool 96JSON Schema ValidatorValidate JSON against draft-07, 2019-09, or 2020-12 JSON Schema with complete local-reference diagnostics.Open tool 97JSON Sort KeysRecursively sort object keys while preserving array order.Open tool 98JSON UnflattenRebuild nested objects and arrays from path-based JSON keys.Open tool 99JSON ValidatorCheck JSON syntax and summarize the root value.Open tool 100JSONPath & JMESPath Query WorkbenchQuery JSON using JMESPath or a non-evaluating JSONPath implementation with explicit supported syntax.Open tool 101JWT Decoder & InspectorDecode JWT header and payload claims without treating the token as trusted.Open tool 102JWT HS256 SignerCreate an HS256 JWT from a JSON payload and a local secret.Open tool 103JWT HS256 VerifierVerify an HS256 signature and inspect the decoded claims locally.Open tool 104JWT RSA & ECDSA VerifierVerify RS256/384/512 or ES256/384 JWT signatures with a local JWK or PEM public key and inspect claim policy.Open tool 105Keyboard Event InspectorCapture key, code, location, modifier, repeat, and composition properties inside an explicit focus target.Open tool 106Line Sorter & DeduplicatorClean, sort, and remove duplicate lines in one pass.Open tool 107List Set OperationsCalculate union, intersection, difference, or symmetric difference between two line lists.Open tool 108Luhn Checksum ValidatorNormalize and validate identifiers that use the Luhn mod-10 checksum.Open tool 109MAC Address Formatter & InspectorValidate and normalize EUI-48 or EUI-64 addresses and inspect their administration and transmission bits.Open tool 110MAC Address Generator & Vendor HintsGenerate unicast MAC addresses or inspect a prefix against a bounded, dated local vendor-hint table.Open tool 111Markdown Table BuilderTurn delimited rows into an escaped, portable Markdown table.Open tool 112Math Typesetter & ConverterTypeset LaTeX, common AsciiMath, or MathML into accessible, inspectable MathML.Open tool 113Maven Version Range ExplainerExplain Maven interval unions and test a comparable artifact version.Open tool 114Mermaid & Graphviz RendererRender Mermaid or Graphviz DOT diagrams into a sanitized SVG preview entirely in the browser.Open tool 115Meta Tag & Social Card BuilderBuild escaped SEO, Open Graph, X/Twitter, canonical, and robots tags from a structured page brief.Open tool 116MIME Type LookupLook up common MIME types by filename, extension, or media type.Open tool 117Molecule & Atomic Coordinate WorkspaceInspect and convert PDB, XYZ, and typed atom coordinates without executing embedded content.Open tool 118Multi-Zone Meeting PlannerInterpret an absolute or local meeting time with explicit DST ambiguity handling and compare working-hour impact across IANA zones.Open tool 119Nano ID GeneratorGenerate compact, URL-safe random identifiers with browser cryptography.Open tool 120NATO Phonetic Alphabet ConverterSpell text with the ICAO/NATO alphabet or restore unambiguous code-word sequences.Open tool 121NDJSON Validator & NormalizerValidate newline-delimited JSON record by record and normalize each value onto one line.Open tool 122NIfTI Neuroimaging Header InspectorInspect NIfTI storage, dimensions, voxel sizes, datatype, and description locally.Open tool 123npm Version Range ExplainerParse npm/node-semver ranges, normalize their comparator sets, and test a concrete version locally.Open tool 124NuGet Version Range ExplainerExplain NuGet interval and floating version notation and test a package version.Open tool 125Number Base ConverterConvert arbitrary-size signed integers between bases 2 and 62 without precision loss.Open tool 126Numeronym GeneratorAbbreviate long words as first-letter + omitted-character count + last-letter.Open tool 127OAuth PKCE GeneratorGenerate or validate a verifier and derive its RFC 7636 S256 challenge.Open tool 128OpenAPI Validator & NormalizerValidate an OpenAPI JSON or YAML document and normalize its key ordering and output syntax.Open tool 129Outlook Safe Links DecoderExtract the original destination from Microsoft Safe Links and common nested redirect wrappers without opening it.Open tool 130Password & Passphrase Strength EstimatorEstimate offline guessing resistance, identify repeated/common patterns, and give local improvement guidance.Open tool 131PBKDF2 Key DerivationDerive bounded SHA-2 key material with WebCrypto and explicit parameters.Open tool 132PDF Form & Metadata EditorFill supported fields and edit document metadata locally.Open tool 133PDF Merge & SplitCombine local PDFs or extract selected page ranges without uploading them.Open tool 134PDF Page OrganizerMerge, split, reorder, rotate, extract, and edit PDF pages and metadata.Open tool 135PDF Raster Compression StudioCreate a smaller raster-based PDF with an explicit quality warning.Open tool 136PDF Signature Inventory & ByteRange CheckerInspect a local PDF for signature dictionaries and structurally validate their signed byte ranges.Open tool 137PDF Text & OCR ExtractorRecognize page text locally with bounded OCR packs and structured results.Open tool 138PEM, JWK & X.509 InspectorInspect certificates and public/private key containers locally without persisting key material.Open tool 139Percentage CalculatorCalculate percentage-of, relative percentage, or percentage change with explicit formulas.Open tool 140Placeholder Text GeneratorGenerate bounded words, sentences, or paragraphs for layout and typography testing.Open tool 141Privacy Camera RecorderPreview and record a camera stream only after explicit permission, then download the in-memory recording.Open tool 142Punycode & IDNA Hostname ConverterConvert internationalized hostnames to ASCII or decode xn-- labels locally.Open tool 143Python Version Specifier ExplainerExplain PEP 440 comparison, compatible-release, exclusion, wildcard, and arbitrary-equality specifiers.Open tool 144QR Payload BuilderCreate a scalable QR symbol from local text with explicit error correction.Open tool 145Query String Parser & BuilderParse duplicate query parameters into JSON or build a query string from a JSON object.Open tool 146Quoted-Printable Encoder & DecoderEncode UTF-8 text for MIME or decode quoted-printable bytes as UTF-8.Open tool 147Random Port GeneratorGenerate unbiased-looking bounded port suggestions with browser cryptography.Open tool 148Regex Find & ReplacePreview a JavaScript regular-expression replacement with match counts and strict size limits.Open tool 149Regex TesterTest a JavaScript regular expression and inspect matches and capture groups.Open tool 150Regular Expression Structure ExplainerExplain common anchors, groups, classes, escapes, and quantifiers without running the expression.Open tool 151Responsive Image Set GeneratorGenerate width variants and an editable picture/srcset snippet.Open tool 152robots.txt AnalyzerParse crawler groups, Allow/Disallow precedence, sitemap lines, and test a path without contacting a website.Open tool 153Roman Numeral ConverterConvert canonical Roman numerals and integers from 1 through 3999.Open tool 154RRULE Recurrence Builder & PreviewBuild a focused RFC-style recurrence rule and preview bounded UTC occurrences.Open tool 155RSA Key Pair GeneratorGenerate an RSA signing or encryption key pair with WebCrypto and export standard PEM plus JWK forms.Open tool 156Safe Markdown PreviewPreview Markdown as inert semantic UI and export sanitized HTML without executing embedded markup.Open tool 157Safe Math Expression EvaluatorEvaluate arithmetic and common mathematical functions with a purpose-built parser—never JavaScript eval.Open tool 158Safe Rich Text & HTML ComposerCompose headings, emphasis, lists, links, and paragraphs while exporting a strict safe-HTML subset.Open tool 159Secure Password GeneratorGenerate strong passwords with browser cryptography, explicit character groups, and an entropy estimate.Open tool 160Secure Token GeneratorGenerate cryptographically random tokens with explicit alphabets, byte lengths, and entropy estimates.Open tool 161Semantic Version ComparatorValidate and compare two Semantic Versioning 2.0.0 versions without package-registry access.Open tool 162Side-by-Side Image Quality ComparatorCompare two equally sized PNG images with exact error metrics and an amplified difference image.Open tool 163Sitemap XML ValidatorValidate sitemap URL sets and indexes, summarize dates and hosts, and flag duplicates or protocol-limit problems.Open tool 164Slug GeneratorCreate clean URL slugs with predictable separators and Unicode handling.Open tool 165Sparse Matrix Exchange WorkspaceValidate Matrix Market coordinate data and convert it to typed, inspectable JSON.Open tool 166Sprite Sheet & CSS BuilderPack ordered PNG assets into one transparent sprite sheet with safe CSS classes.Open tool 167SQL FormatterFormat common SQL clauses and indentation without executing the statement.Open tool 168Stopwatch & CountdownMeasure elapsed time, laps, or a bounded countdown without background services or saved history.Open tool 169Streaming File HashHash large local files incrementally with SHA-256, SHA-512, SHA-1, or MD5 without loading the whole file into memory.Open tool 170String Obfuscation LabTransform text into reversible escape-based representations with prominent non-security warnings.Open tool 171Structured Log & JSONL ExplorerParse JSON Lines and common text logs into searchable event rows with severity and time summaries.Open tool 172Subresource Integrity Generator & VerifierGenerate SHA-256/384/512 integrity metadata for text assets or verify an expected SRI token.Open tool 173Subtitle Timing & Format WorkspaceNormalize subtitle cues and convert them through a typed timeline model.Open tool 174SVG Placeholder GeneratorGenerate a compact, escaped SVG placeholder with dimensions, colors, label, and optional data URI.Open tool 175Text Cleanup WorkbenchNormalize line endings, whitespace, indentation, duplicates, order, wrapping, and direction as you type.Open tool 176Text DiffCompare original and changed text line by line in a side-by-side workspace.Open tool 177Text Escape & UnescapeEscape or unescape JSON string content, HTML entities, and regular-expression literals.Open tool 178Text StatisticsCount words, lines, characters, sentences, and UTF-8 bytes.Open tool 179Time Zone ConverterRender one absolute instant in common IANA time zones using the browser time-zone database.Open tool 180TOTP & HOTP GeneratorGenerate or verify RFC 4226/6238 one-time passwords from a Base32 secret entirely in memory.Open tool 181Transliteration WorkbenchConvert accented and non-Latin writing into a readable Latin approximation without pretending it is translation.Open tool 182ULID GeneratorGenerate sortable 26-character ULIDs or inspect their embedded timestamp.Open tool 183Unicode Character InspectorInspect characters as Unicode code points, UTF-8 bytes, and UTF-16 code units.Open tool 184Unicode Normalizer & Invisible Character DetectorNormalize Unicode and flag invisible or bidirectional formatting controls.Open tool 185Unit ConverterConvert common engineering, everyday, typography, cooking, fuel-economy, storage, and data-rate units.Open tool 186Unix Timestamp ConverterConvert Unix seconds, Unix milliseconds, or a date string into common time forms.Open tool 187URL & IP Defanger / RefangerNeutralize common URL, domain, email, and IP indicators or restore their conventional form.Open tool 188URL Encoder & DecoderEncode or decode URL components and complete URI strings.Open tool 189URL Parser & Query InspectorBreak an absolute URL into components and preserve repeated query parameters.Open tool 190URL, Email, IP, Hash & Date ExtractorExtract unique, syntactically plausible values from pasted text.Open tool 191User-Agent ParserSummarize common browser, operating-system, mobile, and bot signals.Open tool 192UTM URL Builder & CleanerAdd canonical campaign parameters to a URL or remove common tracking parameters while preserving other query values.Open tool 193UUID Generator & ValidatorGenerate random UUID v4 identifiers or inspect an existing UUID.Open tool 194UUID v7 Generator & InspectorGenerate time-ordered RFC 9562 UUID v7 identifiers or inspect their embedded Unix-millisecond timestamp.Open tool 195Video Audio ExtractorExtract an MP3 audio track from local video with bitrate controls.Open tool 196Video CompressorResize, crop, trim, mute, and transcode video with preflight resource estimates.Open tool 197Video to GIF StudioTrim, resize, and choose frame rate before producing an animated GIF.Open tool 198Visual Cron BuilderBuild a standard five-field cron expression from explicit schedule controls and preview upcoming UTC runs.Open tool 199Web App Manifest ValidatorValidate a PWA manifest and explain installability-relevant names, icons, URLs, display modes, and shortcuts.Open tool 200Word Frequency & Readability AnalyzerCount Unicode words and report common terms, sentence density, and an estimated reading score.Open tool 201Workbook & Sheet ExporterSelect XLSX sheets and export each through a collision-safe ZIP package.Open tool 202XML Formatter & ValidatorValidate XML syntax and format its element structure without fetching external entities.Open tool 203YAML Formatter & ValidatorParse YAML safely and emit a clean, consistently indented document.Open tool